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Update npk.py

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Signed-off-by: elseif <elseif@live.cn>
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elseif 2025-09-18 16:33:57 +08:00 • committed by GitHub
parent 6cbdbffbcb
commit 4f9d2133fd
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GPG key ID: B5690EEEBB952194
1 changed files with 20 additions and 31 deletions
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51
npk.py
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@ -207,10 +207,9 @@ class NovaPackage(Package):
self._parts.append(NpkPartItem(NpkPartID(part_id),NpkInfo.unserialize_from(part_data)))
else:
self._parts.append(NpkPartItem(NpkPartID(part_id),part_data))
def set_null_block(self):
def rebuild_squashfs(data):
if len(part.data) < 4 or part.data[:4] != b'hsqs':
return part.data
with open('squashfs.sfs', 'wb') as f:
f.write(data)
os.system('unsquashfs -d squashfs-root squashfs.sfs')
@ -219,19 +218,20 @@ class NovaPackage(Package):
os.system('rm -rf squashfs-root')
with open('squashfs.sfs', 'rb') as f:
return f.read()
if len(self._packages) > 0:
def get_size(package,size=8):
for part in package._parts:
size += 6
size += len(part.data)
return size
def set_null(package,offset=None):
has_squashfs = False
for package in self._packages:
for part in package._parts:
if part.id == NpkPartID.SQUASHFS:
part.data = rebuild_squashfs(part.data)
has_squashfs = True
if not has_squashfs:
return
for package in self._packages:
count = 8
for part in package._parts:
if part.id == NpkPartID.SQUASHFS and len(part.data) >= 4 and part.data[:4] in [b'hsqs',b'sqsh']:
part.data = rebuild_squashfs(part.data)
has_squashfs = True
if has_squashfs:
count = offset or 8
for part in package._parts:
count += 6
if part.id == NpkPartID.NULL_BLOCK:
@ -241,23 +241,12 @@ class NovaPackage(Package):
pad_len = (4096 - (count % 4096)) % 4096
package[NpkPartID.NULL_BLOCK].data = b'\x00' * pad_len
else:
has_squashfs = False
for part in self._parts:
if part.id == NpkPartID.SQUASHFS:
part.data = rebuild_squashfs(part.data)
has_squashfs = True
if not has_squashfs:
return
count = 8
for part in self._parts:
count += 6
if part.id == NpkPartID.NULL_BLOCK:
break
count += len(part.data)
count += 6
pad_len = (4096 - (count % 4096)) % 4096
self[NpkPartID.NULL_BLOCK].data = b'\x00' * pad_len
set_null(self)
offset = get_size(self)
for package in self._packages:
set_null(package,offset)
offset += get_size(package,0)
def get_digest(self,hash_fnc,package:Package=None)->bytes:
parts = package._parts if package else self._parts
for part in parts: